[lld] [lld] Merge equivalent symbols found during ICF (PR #134342)

[Fangrui Song via llvm-commits]

================
@@ -333,6 +333,28 @@ bool ICF<ELFT>::equalsConstant(const InputSection *a, const InputSection *b) {
              : constantEq(a, ra.relas, b, rb.relas);
 }
 
+template <class RelTy>
+static SmallVector<Symbol *> getReloc(const InputSection *sec,
----------------
MaskRay wrote:

I don't think we should scan relocations of folded sections. James' original idea of replacing the InputFile symbols is better.

https://github.com/llvm/llvm-project/pull/134342